Really stupid question

Hello please excuse this question but I'm new to Flight Simming.
I want to download a Mesh.
I want to have the most detailed Meshes so I thought I download first:
FSX Scenery--World Wide Coverage SRTM 3, version 2, mesh of Africa.
than
FSX USA West Coast 10 M Terrain Mesh Series
than
FSX Hawaii 10m Terrain Mesh - Isnt this part of the USA 10m Terrain Mesh?
than
FSX Central America - Caribbean - South America 76M Terrain mesh
FSX FSX World Wide SRTM 38M Mesh Europe
than
FSX Alps 38m Terrain Mesh. Arent these files already included in the Europe files? How is this 38m different from the Europe file?
FSX France 38 m Terrain Mesh Version 3. Arent these files already included in the Europe files? How is this 38m different from the Europe file?
Greetings
Thx
I want to download a Mesh.
I want to have the most detailed Meshes so I thought I download first:
FSX Scenery--World Wide Coverage SRTM 3, version 2, mesh of Africa.
than
FSX USA West Coast 10 M Terrain Mesh Series
than
FSX Hawaii 10m Terrain Mesh - Isnt this part of the USA 10m Terrain Mesh?
than
FSX Central America - Caribbean - South America 76M Terrain mesh
FSX FSX World Wide SRTM 38M Mesh Europe
than
FSX Alps 38m Terrain Mesh. Arent these files already included in the Europe files? How is this 38m different from the Europe file?
FSX France 38 m Terrain Mesh Version 3. Arent these files already included in the Europe files? How is this 38m different from the Europe file?
Greetings
Thx